Do i need Node.js ?How to upgrade Node.js?

Hi everyone new user here.

I want to make a static website with Wappler (with Firebase Hosting)
My backend is on Azure Cosmos Db + Azure Functions.
I need to call my Azure Functions (rest API) to log my users in , check subscription status etc (response will be in json)
And i will be embedding my games on my static site in an Iframe (games made with Construct 3)

I made a Firebase project but I am getting this error:
Firebase CLI v9.23.0 is incompatible with Node.js v6.10.1
Please upgrade Node.js to version >= 10.13

Do i need Node.js? My background is Beginner C# which i used to make my backend / Azure Functions and I don’t know anything about Node.js so sorry if this is a silly question.

If i need it how should i upgrade it ?
Thanks